<?php
/**
 * comment 表的操作类，继承基础模型类
 */
class commentModel extends model{
    /** 
     * 添加留言
    */
    public function insert(){
        //接收输入数据
        $data['poster']=$ _POST['poster'l;
        $data['mail']= $_POST['mail'];
        $data['comment']=$ _POST['comment'];
        //为其他字段赋值
        $data['reply'}=“;
        $data['date']= date('Y-m-d H:i:s');
        $data['ip']=$_SERVER['REMOTE_ADDR'};
        //拼接 SQL 语句
        $sql="insert into comment set";
        foreach ($data as $k => $v) {
        $sql.="$k='$v',";
        }
        $sql=rtrim($sql,',');//删除最右边的逗号
        //执行 SQL 并返回
        return $this->db->query($sql);;
        } 
    }